ADN catalogue of questions 2017: Chemicals
Chemicals — knowledge of physics and chemistryExamination objective 1: General
Number / Source / Correct answer
331 01.0-01 / Basic general knowledge / B
The combustion of butane is:
AA physical reaction
BA chemical reaction
CA biological reaction
DA geological reaction
331 01.0-02 / Basic general knowledge / B
Which of the following could happen to a substance in a physical reaction?
AThe substance’s state changes and the substance itself also changes
BThe substance’s state changes but the substance itself does not change
CThe substance’s state does not change but the substance itself changes
DThe substance’s state does not change, nor does the substance itself
331 01.0-03 / Basic general knowledge / C
Which of the following reactions is a chemical reaction?
AThe melting of candle wax
BThe dissolving of sugar in water
CThe oxidation of iron
DThe evaporation of motor spirit or gasoline or petrol
331 01.0-04 / Basic general knowledge / D
Which of the following reactions is a physical reaction?
AThe combustion of diesel fuel
BThe decomposition of water into hydrogen and oxygen
CThe oxidation of aluminium
DThe solidification of benzene
331 01.0-05 / Basic general knowledge / B
Which of the following reactions is a physical reaction?
AThe decomposition of mercury oxide into mercury and oxygen
BThe expansion of gasoil
CThe polymerization of styrene
DThe combustion of home heating oils
331 01.0-06 / Basic general knowledge / A
What is the evaporation of UN No. 1846, CARBON TETRACHLORIDE?
AA physical reaction
BA chemical reaction
CA biological reaction
DA geological reaction
331 01.0-07 / Basic general knowledge / B
What is polymerization of UN No. 2055, STYRENE MONOMER STABILIZED?
AA physical reaction
BA chemical reaction
CA biological reaction
DA geological reaction
331 01.0-08 / Basic general knowledge / C
What is the combustion of UN No. 2247, n-DECANE?
AA biological reaction
BA physical reaction
CA chemical reaction
DA geological reaction
Chemicals — knowledge of physics and chemistry
Examination objective 2: Temperature, pressure, volume
Number / Source / Correct answer
331 02.0-01 / Basic knowledge of physics / C
Which value is equivalent to 0.5 bar?
A0.5 kPa
B5.0 kPa
C50.0 kPa
D500.0 kPa
331 02.0-02 / Basic knowledge of physics / B
A closed container has a pressure of 180 kPa at a temperature of 27°C. The volume of the container does not change. What is the excess pressure at 77°C?
A154.3 kPa
B210.0 kPa
C230.0 kPa
D513.3 kPa
331 02.0-03 / Basic knowledge of physics / D
A closed cargo tank is 95 % filled with UN No. 1547, ANILINE. When will vaporization of the aniline cease?
AOnce the pressure of the aniline vapour is equal to the outside air pressure
BOnce the aniline has completely vaporized
COnce the critical temperature has been reached
DOnce the pressure of the aniline vapour is equal to the saturated vapour pressure
331 02.0-04 / Basic knowledge of physics / A
The pressure above a liquid increases. What happens to the liquid’s boiling point?
AThe boiling point increases
BThe boiling point decreases
CThe boiling point remains the same
DThe boiling point increases then drops
331 02.0-05 / Basic knowledge of physics / C
A closed bottle of gas is heated in the sun. What happens?
AOnly the pressure rises
BOnly the temperature rises
CBoth the pressure and the temperature rise
DThe pressure falls, but the temperature rises
331 02.0-06 / Basic knowledge of physics / C
A closed empty cargo tank with a volume of 240 m3 has an excess pressure of 10 kPa. The tank receives a liquid cargo of 80 m3. The temperature remains constant. What is then the excess pressure in the cargo tank?
A5 kPa
B7.5 kPa
C15 kPa
D30 kPa
331 02.0-07 / Basic knowledge of physics / B
A liquid at constant temperature has:
AA specific shape and a specific volume
BNo specific shape, but a specific volume
CA specific shape, but no specific volume
DNo specific shape or volume
331 02.0-08 / Basic knowledge of physics / A
What is the critical temperature?
AThe temperature above which a gas cannot be liquefied
BThe lowest temperature possible, namely 0 K
CThe temperature above which a gas can be liquefied
DThe temperature at which the lower explosive limit is reached
331 02.0-09 / Basic knowledge of physics / A
Which temperature is equivalent to 353 K?
A80 ºC
B253 ºC
C353 ºC
D626 ºC
331 02.0-10 / Basic knowledge of physics / C
At 21°C, the volume of an enclosed gas is 98 litres. The pressure remains constant. What is the volume at 30°C?
A95 litres
B98 litres
C101 litres
D140 litres
331 02.0-11 / Basic knowledge of physics / B
What is the lowest temperature possible?
A0 ºC
B0 K
C-273 K
D273 K
331 02.0-12 / Basic knowledge of physics / B
Which liquids are considered as liquids having a low boiling point?
ALiquids with a boiling point below 0°C
BLiquids with a boiling point below 100°C
CLiquids with a boiling point between 100°C and 150°C
DLiquids with a boiling point above 150°C
331 02.0-13 / Basic knowledge of physics / C
When a pure substance melts, what happens to the temperature?
AIt rises
BIt falls
CIt remains constant
DIt rises or falls depending on the substance
331 02.0-14 / Basic knowledge of physics / B
The boiling point of UN No. 1897, TETRACHLOROETHYLENE is 121°C. What is tetrachloroethylene ?
AA liquid with a low boiling point
BA liquid with a medium boiling point
CA liquid with a high boiling point
DA gas
331 02.0-15 / Basic knowledge of physics / C
Which is equivalent to a temperature of 30°C?
A30 K
B243 K
C303 K
D-243 K
331 02.0-16 / Basic knowledge of physics / D
Which are liquids with a high boiling point?
ALiquids with a boiling point below 50°C
BLiquids with a boiling point below 100°C
CLiquids with a boiling point between 100°C and 150°C
DLiquids with a boiling point above 150°C
331 02.0-17 / Basic knowledge of physics / B
In Gay-Lussac’s law, what unit is always used to express temperature?
AºC
BK
CPa
DºF
331 02.0-18 / Basic knowledge of physics / A
The boiling point of UN No. 1155, DIETHYL ETHER is 35°C. What is diethyl ether?
AA liquid with a low boiling point
BA liquid with a medium boiling point
CA liquid with a high boiling point
DA liquid with a very high boiling point
331 02.0-19 / Basic knowledge of physics / D
Which unit is used to express pressure?
AThe kelvin
BThe litre
CThe newton
DThe pascal
331 02.0-20 / Basic knowledge of physics / D
What ppm value is equivalent to a volume of 100 %?
A1 ppm
B100 ppm
C1,000 ppm
D1,000,000 ppm
331 02.0-21 / Basic knowledge of physics / B
A closed container has an excess pressure of 200 kPaat a temperature of 7°C. The excess pressure rises to 400 kPa. The volume does not change. What is the new temperature?
A14 ºC
B287 ºC
C560 ºC
D-133 ºC
331 02.0-22 / Basic knowledge of physics / C
In an enclosed space, the absolute temperature drops to half the initial temperature. What happens to the pressure?
AThe pressure doubles
BThe pressure remains constant
CThe pressure drops by half
DThe pressure becomes four times lower
331 02.0-23 / Basic knowledge of physics / C
What does the boiling point of a liquid signify?
AThe pressure of the liquid at a temperature of 100°C
BThe quantity of liquid that reaches boiling point
CThe temperature at which the liquid is converted to a vapour at a pressure of 100 kPa
DThe volume of a liquid at a temperature of 100°C and a pressure of 100 kPa
Chemicals — knowledge of physics and chemistry
Examination objective 3: Physical state
Number / Source / Correct answer
331 03.0-01 / Basic knowledge of physics / C
What is the transition from solid to gaseous state called?
ASolidification
BCondensation
CSublimation
DGasification
331 03.0-02 / Basic knowledge of physics / B
What is the transition from gaseous to liquid state called?
ASolidification
BCondensation
CMaturation
DSublimation
331 03.0-03 / Basic knowledge of physics / B
What is condensation an example of?
AThe transition from gaseous to solid state
BThe transition from gaseous to liquid state
CThe transition from liquid to gaseous state
DThe evaporation of a substance
331 03.0-04 / Basic knowledge of physics / A
Which of the following is an example of sublimation?
AThe transition of carbonic snow to a gaseous state
BThe formation of condensation on a cold window
CThe solidification of molten iron
DThe evaporation of liquid hexane from soya cake
331 03.0-05 / Basic knowledge of physics / D
What is solidification?
AThe transition from solid to liquid state
BThe transition from liquid to gaseous state
CThe transition from gaseous to liquid state
DThe transition from liquid to solid state
331 03.0-06 / Deleted (2012)
331 03.0-07 / Basic knowledge of physics / C
What is the transition from solid to gaseous state called?
AMelting
BSolidification
CSublimation
DGasification
331 03.0-08 / Basic knowledge of physics / A
At normal pressure, the temperature of a substance is higher than its boiling point. What then is the physical state of the substance?
AGaseous
BLiquid
CSolid
DLiquid or solid
331 03.0-09 / Basic knowledge of physics / B
What physical state does UN No. 1605, ETHYLENE DIBROMIDE (1.2DIBROMETHANE) assume at a temperature of +5°C?
AA gaseous state
BA solid state
CA liquid state
DAn indeterminate state
331 03.0-10 / Basic knowledge of physics / C
What is the transition of a substance from a solid state to a gaseous state called?
AEvaporation
BCondensation
CSublimation
DRecombination
331 03.0-11 / Basic knowledge of chemistry / A
A new substance is formed as a result of a reaction. What kind of reaction has taken place?
AA chemical reaction
BA physical reaction
CA meteorological reaction
DA logical reaction
Chemicals — knowledge of physics and chemistry
Examination objective 4: Fire, combustion
Number / Source / Correct answer
331 04.0-01 / Basic knowledge of substances / B
The explosivity range of UN No. 1547, ANILINE is 1.2 % to 11 % (by volume). What would the properties of a mixture of 0.1 % (by volume) of aniline and 99.9 % (by volume) of air be?
AFlammable but not explosive
BNeither flammable nor explosive
CFlammable and explosive
DNot flammable, but explosive
331 04.0-02 / Basic knowledge of substances / B
The auto-ignition temperature of UN No. 1779, FORMIC ACID is 480°C. Which of the following is true if the temperature of the formic acid-air mixture is below 480°C?
AThe formic acid cannot ignite
BThe formic acid cannot ignite spontaneously (of its own accord)
CThe formic acid might ignite spontaneously (of its own accord)
DThe formic acid might ignite spontaneously (of its own accord), but not explode
331 04.0-03 / Basic knowledge of substances / C
What is a catalyst?
AA substance that prevents polymerization without contaminating the product
BA substance that prevents static electricity without contaminating the product
CA substance that accelerates a reaction but is not altered by the reaction
DA substance that can be added as a colouring without contaminating the product
331 04.0-04 / Basic knowledge of substances / B
What is a detonation?
AA cleaning product
BAn explosion
CA test tube
DAn inhibitor
331 04.0-05 / Basic knowledge of substances / C
The flash-point of UN No. 1282, PYRIDINE is 20 ºC. What happens to pyridine at a temperature of 25 ºC?
AIt is liable to ignite spontaneously
BIt does not produce enough vapour to be ignitable
CIt produces enough vapour to be ignitable
DIt produces too much vapour to be ignitable
331 04.0-06 / Basic knowledge of substances / A
Which reaction requires the highest speed of combustion?
AA detonation
BA deflagration
CAn explosion
DAn implosion
331 04.0-07 / Basic knowledge of substances / C
How can an explosion be prevented by thermal intervention?
ABy heating the substance
BBy increasing the pressure on the substance
CBy cooling the substance
DBy compressing the substance
331 04.0-08 / Basic knowledge of substances / B
The explosivity range of UN No. 1114, BENZENE is 1.2 to 8.6 % (by volume). What would the properties of a mixture of 5 % (by volume) of benzene and 95 % (by volume) of air be?
ANon-flammable but explosive
BFlammable and explosive
CNeither flammable nor explosive
DFlammable but not explosive
Chemicals — knowledge of physics and chemistry
Examination objective 5: Density
Number / Source / Correct answer
331 05.0-01 / Basic knowledge of substances – ρ = m/V / B
A cargo of UN No. 2874, FURFURYL ALCOHOL has a mass of 550 tonnes. The relative density of furfuryl alcohol is 1.1. What is the volume of the cargo?
A5 m3
B500 m3
C605 m3
D2,000 m3
331 05.0-02 / Basic knowledge of substances – ρ = m/V / C
A cargo of UN No. 1991, CHLOROPRENE, STABILZED, has a volume of 500 m3. The relative density of chloroprene is 0.96. What is the mass of the cargo?
A0.48 t
B192.0 t
C480.0 t
D521.0 t
331 05.0-03 / Basic knowledge of substances – ρ = m/V / A
A cargo of 600 m3 UN No. 1218, ISOPRENE has a mass of 420 tonnes. What then is the relative density of the isoprene?
A0.7
B2.03
C1.43
D2.52
331 05.0-04 / Basic knowledge of substances – ρ = m/V / B
How is the density of a substance calculated?
ABy dividing the volume by the mass
BBy dividing the mass by the volume
CBy multiplying the volume by the mass
DBy adding the mass and the volume
331 05.0-05 / Basic knowledge of substances – ρ = m/V / C
The temperature of a quantity of UN No. 1547, ANILINE increases. What happens to the density of the aniline?
AThe density increases
BThe density remains constant
CThe density decreases
DThe density sometimes increases and sometimes decreases
331 05.0-06 / Basic knowledge of substances – ρ = m/V / B
The mass density (density) of a substance is given as 2.15 kg/dm3. Which value corresponds to this density?
A0.00215 t/m3
B2.15 t/m3
C21.5 t/m3
D215 t/m3
331 05.0-07 / Basic knowledge of substances – ρ = m/V / B
The relative density of a liquid is 0.95. What is the mass of 1,900 m3 of this liquid?
A1,805 kg
B1,805 t
C200 kg
D200 t
331 05.0-08 / Basic knowledge of substances – ρ = m/V / A
The mass of 180 litres of UN No. 1092, ACROLEINE, STABILIZED is 144 kg. What is the relative density of the substance?
A0.8
B1.25
C2.59
D3.6
331 05.0-09 / Basic knowledge of substances – ρ = m/V / C
The relative density of a substance is 1.15. What is its volume if its mass is 2,300 tonnes?
A250 m3
B500 m3
C2,000 m3
D2,645 m3
331 05.0-10 / Basic knowledge of substances – ρ = m/V / A
The volume of a quantity of gas decreases. What happens to the density?
AThe density increases
BThe density remains constant
CThe density decreases
DThe density sometimes increases and sometimes decreases
331 05.0-11 / Basic knowledge of substances – ρ = m/V / A
How is the mass of a substance calculated?
ABy multiplying the mass density (density) by the volume
BBy dividing the mass density (density) by the volume
CBy dividing the volume by the mass density (density)
DBy dividing the volume by the pressure
331 05.0-12 / Basic knowledge of substances – ρ = m/V / C
How is the volume of a substance calculated?
ABy multiplying the mass density (density) by the mass
BBy dividing the mass density (density) by the mass
CBy dividing the mass by the mass density (density)
DBy dividing the mass by the pressure
331 05.0-13 / Basic knowledge of substances – ρ = m/V / A
The temperature of a quantity of UN No. 2789, ACETIC ACID SOLUTION decreases. How does the density of the acetic acid change?
AThe density increases
BThe density decreases
CThe density remains constant
DThe density sometimes increases sometimes decreases
331 05.0-14 / Basic knowledge of substances – ρ = m/V / C
What is the unit of mass density (density) used in the International System of Units (SI)?
Am3
Bkg
Ckg/m3
Dl
331 05.0-15 / Basic knowledge of substances – ρ = m/V / C
What does the density of a gas depend on?
AOn temperature only
BOn pressure only
COn pressure and temperature
DOn volume only
331 05.0-16 / Basic knowledge of substances – ρ = m/V / B
In most cases, how does the density of liquid vapours compare with the density of the outside air?
AIt is equivalent
BIt is higher
CIt is lower
DNone of the above
Chemicals — knowledge of physics and chemistry
Examination objective 6: Mixtures, chemical bonds
Number / Source / Correct answer
331 06.0-01 / Basic knowledge of chemistry / B
A metal reacts with oxygen. A black powdery substance results. What do we call this substance?
AAn element
BA compound
CAn alloy
DA mixture
331 06.0-02 / Basic knowledge of chemistry / D
Which of the following statements is true?
AA mixture always consists of three substances in specific proportions
BA mixture involves a chemical reaction
CWhen a mixture is produced, heat is always released
DA mixture is a physical notion
331 06.0-03 / Basic knowledge of chemistry / C
What is pure water (H2O) an example of?
AAn alloy
BAn element
CA compound
DA mixture
331 06.0-04 / Basic knowledge of chemistry / C
What does an organic compound always contain?
AHydrogen atoms
BOxygen atoms
CCarbon atoms
DNitrogen atoms
331 06.0-05 / Basic knowledge of chemistry / A
What is formed when sugar is dissolved?
AA mixture
BA compound
CAn alloy
DAn element
331 06.0-06 / Basic knowledge of chemistry / B
What happens when hydrogen is released from a compound?
ABeing heavier than air, it collects near the ground
BBeing lighter than air, it rises
CIt immediately combines with nitrogen in the air
DWater is formed in a catalytic reaction
331 06.0-07 / Basic knowledge of chemistry / D
Which elements are contained in the compound nitric acid (HNO3)?
ASulphur, nitrogen and oxygen
BCarbon, hydrogen and nitrogen
CHelium, sodium and oxygen
DHydrogen, nitrogen and oxygen
331 06.0-08 / Basic knowledge of chemistry / B
Can liquids be mixed?
AYes, liquids are always miscible
BYes, but not all liquids are miscible with each other
CNo, liquids are never miscible
DYes, liquids are miscible in any proportions
Chemicals — knowledge of physics and chemistry
Examination objective 7: Molecules, atoms
Number / Source / Correct answer
331 07.0-01 / Basic knowledge of chemistry / A
What is NaNO3?
AAn inorganic compound
BAn organic compound
CA mixture
DAn alloy
331 07.0-02 / Basic knowledge of chemistry / B
What is C3H8?
AA mixture
BAn organic compound
CAn inorganic compound
DAn alloy
331 07.0-03 / Basic knowledge of chemistry / D
What is the symbol for the element “oxygen”?
AS
BH
CN
DO
331 07.0-04 / Basic knowledge of chemistry / B
What is the symbol for the element “nitrogen”?
AS
BN
CO
DH
331 07.0-05 / Basic knowledge of chemistry / C
Which of the following statements is false?
AMolecules are composed of atoms
BA pure substance is composed of a single type of molecule
CA compound is always composed of a single type of atom
DAn element is composed of a single type of atom
331 07.0-06 / Basic knowledge of chemistry / A
What is the symbol for the element “hydrogen”?
AH
BO
CW
DN
331 07.0-07 / Basic knowledge of chemistry / A
Which of the following statements is correct?
AA molecule is an electrically neutral particle composed of two or more atoms
BA molecule is the smallest unit of a substance that has half of all the properties of the substance
CElements are composed of molecules that comprise several types of atoms
DThere are approximately 11 million types of atoms
331 07.0-08 / Basic knowledge of chemistry / A
What is an element always made up of?
AAtoms
BMixtures
CCompounds
DMolecules
331 07.0-09 / Basic knowledge of chemistry / B
What is the term for term for an electrically neutral particle composed of two or more atoms?
AA neutron
BA molecule
CAn ion
DA proton
331 07.0-10 / Basic knowledge of chemistry / B
What is the correct formula for three molecules of water?
A(H2O)3
B3 H2O
CH6O3
DH2O
331 07.0-11 / Basic knowledge of chemistry / D
What is the Latin name for oxygen?
AFerrum
BHydrogenium
CNitrogenium
DOxygenium
331 07.0-12 / Basic knowledge of chemistry / B
In chemical formulae, what is the significance of the letter “N”?
ACarbon
BNitrogen
CHydrogen
DOxygen
331 07.0-13 / Basic knowledge of chemistry / A
What is the symbol for carbon?
AC
BH
CK
DO
331 07.0-14 / Basic knowledge of chemistry / B
What is the molecular mass of UN No. 1294, TOLUENE (C6H5CH3)?
(C = 12, H = 1)
A78
B92
C104
D106
331 07.0-15 / Basic knowledge / A
At what temperature does the kinetic energy of molecules equal zero?
A-273°C
B212 K
C273 K
D-100°C
Chemicals — knowledge of physics and chemistry
Examination objective 8: Polymerization
Number / Source / Correct answer
331 08.0-01 / Basic knowledge of chemistry / B
What is an inhibitor?
AA substance that accelerates a reaction
BA substance that prevents polymerization
CA substance that attacks the nervous system
DA substance that prevents electrostatic charge
331 08.0-02 / Basic knowledge of chemistry / A
What substance prevents polymerization?
AAn inhibitor
BA capacitor
CA catalyst
DAn indicator
331 08.0-03 / Basic knowledge of chemistry / A
Which of the following statements is correct?
AAn inhibitor should be properly mixed with the product
BAn inhibitor may react with the product
CAn inhibitor may easily evaporate from the product
DAn inhibitor should have a low flash-point
331 08.0-04 / Basic knowledge of chemistry / A
What is polymerization?
AThe process by which one or more reactions result in a very large molecule
BA process of combustion during which much heat is liberated
CThe process by which a compound is destroyed under the effect of heat
DThe process by which a compound is destroyed under the effect of an electric current
331 08.0-05 / Basic knowledge of chemistry / C
A cargo tank contains a product that is liable to polymerize easily. To prevent polymerization, an inhibitor has been added. During carriage, a small quantity of the product evaporates and condenses some time later on the surface of the cargo tanks. What might happen to the condensate?
AThe condensate will not polymerize since it contains an inhibitor
BThe condensate will not polymerize since it will evaporate first